Expose Android application storage paths

Engine/include/Tempest/AndroidApi

@@ -0,0 +1 @@
+#include "../system/api/androidapi.h"

Engine/system/api/androidapi.cpp

@@ -12,6 +12,7 @@
 #include <android/native_window.h>
 
 #include <atomic>
+#include <cassert>
 #include <cstdlib>
 #include <dlfcn.h>
 #include <exception>
@@ -29,6 +30,17 @@ static bool            focused    = false;
 static bool            active     = false;
 static bool            hasWindow  = false;
 
+std::filesystem::path AndroidApi::internalDataPath() {
+  assert(app!=nullptr && app->activity!=nullptr);
+  return app->activity->internalDataPath;
+  }
+
+std::filesystem::path AndroidApi::externalDataPath() {
+  assert(app!=nullptr && app->activity!=nullptr);
+  const char* path = app->activity->externalDataPath;
+  return path!=nullptr ? path : "";
+  }
+
 void AndroidApi::updateFocus() {
   const bool next = resumed && focused;
   if(active==next)

Engine/system/api/androidapi.h

@@ -1,10 +1,15 @@
 #pragma once
 
 #include <Tempest/SystemApi>
+#include <filesystem>
 
 namespace Tempest {
 
 class AndroidApi final : SystemApi {
+  public:
+    static std::filesystem::path internalDataPath();
+    static std::filesystem::path externalDataPath();
+
   private:
     AndroidApi() = default;